Seven male and seven female subjects with similar performance were selected to run 400m and 3,000m in order to examine the difference between the sexes in anaerobic and aerobic work capacity. The mean velocity of 400m and 3,000m runs was 5.3±0.3m・sec⁻¹ and 3.5±0.3m・sec⁻¹ for males and 5.5±0.2m sec⁻¹ and 4.0±0.2m・sec⁻¹ for females, respectively. There was no significant difference in the running velocity of males or females in either the running of 400m and 3,000m. The lactate level after the 400m and 3,000m runs in males was a little higher that in females, but no significant difference existed between males and females. A correlation of r=0.76 (p<0.05) and r=0.85 (p<0.02) was found between velocity of 400m run and peak block lactate concentration in the males and females. The glycerol concentration after 400m and 3,000m run did not differ significantly between male and female groups. In all subjects a high correlation coefficient (r=0.62, p<0.05) was observed between the running velocity at 3,000m and the concentration of glycerol in the blood. In the 400m and 3,000m runs there was no significant difference in the catecholamine in the blood.
　From these results, it is suggested that the energy supply of aerobic and anaerobic exercise may be identical qualitatively, but not quantitatively, in both male and female subjects with respect to lactate, glycerol and catecholamine in blood.

DESCENTE SPORTS SCIENCE Vol.5/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE